Smith et au



2 Sheets-Sheet l TTL YF F5 OOOOOOOA E. D.'SM|TH ET AL AUTOMATIC BATTERY CHARGING AND VOLTAGE REGULATING SYSTEM Filed May 27, 1922 Nov. 15, 1927.

' "Nov. 15, 1927. 1,649,136

7 E. D. SMITH ET AL AUTCMATIC BATTERY CHARGING AND VOLTAGE REGULATING SYSTEM Filed May 27. 1922 2 Sheets-Sheet 2 HUSH UIIS Eru: 115W Jaflham Hferkms .Z. Eli-[T Patented Nov. 15, 1927.

UNITED STATES PATENT OFFICE.

ERIC D. SMITH, OF CHICAGO, AND WILLIAIM H. P RKINS, OF OAK PARK, ILLINOIS, ASSIGNORS, BY MESNE ASSIGNMENTS. TO AUTOMATIC ELECTRIC INC., OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE AUTOMATIC BATTERY-CHARGING AND VOLTAGE-REGULATING SYSTEM.

Application filed May 27,

The present invention relates in general to automatic battery charging and voltage regulating systems, and the object of the invention, broadly stated, is to produce a new and improved system of this character operating on novel principles and possessing numerous advantages not found in prior systems.

A special object is the production of a new and improved step by step switching device, adapted to be driven by an ordinary electric motor, and particularly valuable in a system of the character herein described, although its utility is not-limited to such systems, as will be pointed out hereinafter.

The above pointed out objects, together with the others not specifically mentioned at this time, will be explained fully in connection with the accompanying'drawings, comprising Fi'gs.-.-1 and 2, which show a complete battery charging and voltage regulab ing system including' oneizmechanical embodiment of the improved switching device.

Referring to Fig. 1, there is shown a storage battery B, a counter cellbattery B, a motor generator and associated equipment for charging the battery;B and a pair of bus bars to which current is supplied by the battery B. l

Figure 2 shows the improved switching device SD, the operating motor M, and various controlling relays.

The switching device SD, which is the device with which the invention is particularly concerned, has a set of contacts, as shown, which are adapted to be wiped over by the contact arm or wiper 23. The operating rack 24, the locking rack 25, and the wiper 23 are keyed to the shaft 26, which shaft may be rotatably mounted in any well known-or desired manner. The wiper 23 .is normally locked, as shown, by the locking lever 30, which is normally in oneof the notches such as 29 in the periphery of the locking rack 25. The roller 32, which is secured to the locking lever 30, rides along the rim of-the cam 34 or into the depression cut into the latter. The cam 34, single tooth gear wheel 35, and the gear wheel 36 are mounted on and keyed to the rotatable shaft 33. The gear wheel 36 is adapted to be turned in one direction or the other by the motor M, depending upon the direction in which the latter rotates. The springs 16 andl? are controlled by the 1922. Serial No. 564,088.

end of the locking lever 30, as may be readily seen.

Of the controlling relays -48, inclusive, the marginally ad]usted relays 45 and 46 are bridged across the bus-bars shown in Fig. 1. The relays 47 and 48 are controlled by relays 45 and 46, respectively, and-control the motor M as will be explained hereinafter.

The starter S, Fig. 1, is controlled by the switching device SD, F ig. 2, through the medium of relay 7. This starter is operated by the solenoid 6, which pulls the plunger 1 up when current flows through the former. In order to secure the-proper slowness of operation of the plunger 1, the dash pot2 is associated with the lower end thereof. This (rash pot may be of anywell known design. The starter S controls the motor of the motor generator MG, and the generator of the motor generator MG charges the battery B by sending current through the latter byway of the automatic circuit breaker GB. The

battery B is assumed to comprise two dozen .which is desired for thebus-bars shown.

\Vhen fully charged, however, the potential of the battery B is considerably higher than is desired for the bus-bars. The potential across the bus-bars is kept within the desired limits by cutting in or out the proper num-' ber ofcells of the counter cell battery B. This is done by the switching device SD as will be explained subsequently.

Although several batteries are shown associated with the relays and the like, it is to be understood that these batteries are shown for convenience only, and that the lower or negative bus-bar, Fig. 1, is actually connected to each point where one of the before mentioned batteries is connected. It will be understood also that the ground or positive bus-bar is connected'to each point where ground is indicated.

The apparatus, having been described in general, will now be described in connection with a detailed description of its operation. For this purpose it will be assumed that the potential across the bus-bars shown in Fig. 1 drops below the desired point. That being the case, the marginally adjusted law voltage Lil relay 45, which is bridged across these busbars through the resistances 62 and 63, releases its armature 49, thereby opening the circuit of relay 47. Relay 47 now dcenergizes and at armature 54 places a shunt around resistance 62 so as to enable relay 45 to again'attract armature 4-9 when the potential across the bus-bars is raised the desired amount. As a further result of the deener gization of relay 47, it opens a point in the circuit of relay 48 at armature 53 so as to guard against any possible energization of this relay at this time; opens a point 111 its own previously established locking circuit at armature 52; and at armature 51 opens a point in the circuit. of the left hand field winding of the series wound motor M, and closes a circuit for the motor M by way of the right hand field thereof as follows: from ground by way of resistance 39, armature 51 and its resting contact, contact of spring and said spring, right hand field winding of the motor M, and the armature of the motor M to battery. The right hand held winding of the motor M is wound in a direction opposite to that in which the left hand field wind ing'iS wound, and in a direction to cause the motor M to drive the wheel 36 through the medium of the worm gear in a counter clockwise direction. Even though the motor M is running'at this time at'practically no'load, it does not operate unduly fast owing to the fact that the resistance 39-is included in its circuit. rotate in a counterclockwise direction without producing any particular result other than that the roller 32 revolves as the cam 34 passes under it; This kGQPSJlP' until the notch cut in the cam '34 'come's 'under the roller 32. When thisoccurs,'--the roller 32 rides down into the notch in the cam 34, the lever being operated under the tension of the stiff sprin 31. Upon the lever 30 moving slightly, t e springs 16 and 17 operate. Spring 17, upon coming into engagement with its cont-act, places a shunt'arou'nd the resistance 39 so as to enable the motor M to operate the wiper assembly at the desired speed. Spring 16, upon breaking away from its lower contact, opens a'point in the pickup circuit of relay 47. Thisinsures that the motor M will not be stopped at an undesirable point.

As the locking lever 30 moves further, owing to the roller 32 going deeper into the notch in the cam 34, it comes out of the notch 29 in the locking rack 25, thereby leaving the latter free to rotate except for such friction as may be between the wiper 23 and the contact it is standing on and the friction of the shaft 26 in its bearing. Just after the loele ing lever 30 has cleared the rack 25, the. tooth 40 on the wheel comes into engagement with the left hand side of the notch 28 in the rack 24. As the motor continues to The gear-wheel 36 continues to-- run, the tooth rotates the wiper assembly in a clockwise direction until the former disengages from the notch 28, which occurs when the notch 28 is in approximately the position occupied by the notch 27 in the drawing. At this time the notch -12 in the locking rack 25 is in the position'occupicd by the notch 29 in the drawing, and the wiper 23 has moved from the contact 20 across contact 21 and is in engagement with contact 22.

slightly rounded, and also that the end of the-'- locking lever 30 which engages these notches is slightly bevelled. This allows for any slight mechanical-inaccuracy and also provides for centering the wiper 23 on a contact in case certain parts become slightly worn after long continued use. Just before the locking lever 30 completes its movement, the springs 16 and 17 are switched back to the position shown in the drawing. Upon com'- ing into engagement with its lower contact;-

spring 16 closes a point. in the pick-up circuit of relay 1-7. Spring 17, upon moving out of engagement with its associated contact, again i:

insertsthe resistance 39 into the circuit of the motor M so as to prevent the latter from speeding up when the load is removed.

Regarding the operation of the wiper 23 in raising the potential between the busbars, it will be noted that the said wiper 23, which controls the current of the negative bus bar, comes-into "engagement with contact 21 before;it breaks away from contact 20. This is necessary in order to prevent the negative bus-bar from being momentarily disconnected. It-wvill be noted that a local circuit is closed at th'is time for the counter cell of the battery B which is connected between the contacts 20 and 22. However, an excessive flow of current in this local circuit is prevented by the resistance 19, which resistance is very low and does not appreciably affect the potential of the negative bus-bar. As the wiper 23 is moved further it comes out-of engagement with contact 20, thereby opening the local circuit of the counter cell which is being cut out, and. upon moving into engagement with contact 22, cuts out the resistance 19.

Assuming that the removal of the counter cell. as described above, brings the potential of the negative bus-bar up to the desired point, which is ordinarily the case, relay pulls up again as soon as, or perhaps slightly before, wiper 23 comes to rest, and, upon so doing. closes a point in the circuit of relay 47. Assuming that this occurs before spring 16 shifts back to normal, relay 47 .does not energize for the time being. In

ti l

any event, however, regardless of which takes place first, as soon as these two things have happened, relay 47 energizes over the following circuit: from ground by way of spring 16 and its lower contact, armature 49 and its working contact, and relay 47 to battery. Relay 47, upon energizing, removes the shunt. from around resistance 62 at armature 54 so as to prepare relay 45 for its next operation; prepares a circuit for relay 48 at armature 53; closes a locking circuit for itself at armature 52 independent of spring 16 and its lower contact; and at armature 51 opens the circuit of the motor M and prepares a circuit for operating the said motor M in the reverse direction. The motor M now comes to rest due to friction and stops with the single toothed gear wheel in approximately the position shown in the drawing.

As the voltage of the battery B drops lower, due to the battery becoming more and more nearly discharged, relay 45 falls back again, whereupon the above described operations are repeated with the result that wiper 23 moves over two more contacts and another counter cell is cut out.

The next time the potential of the negative bus-bar drops below the desired point, the last counter cell is cut out and the wiper 23 comes to rest in engagement with the contactunder th'e end of the spring assembly containing the spring 11. \Vhen the wiper 23 comes into this position, the end thereof operates the spring 11 through the medium of the auxiliary spring and the insulating bushing. Spring 11, upon coming into engagement with its associated contact, closes a circuit for relay 7. Relay 7, upon energizing, closes a locking circuit for itself at armature 8, and at armature 9 closes a circuit for the solenoid 6 of the starter S, by way of the parallel contacts wiped over by the contact arm 3. Upon energizing, solenoid 6 attracts the plunger 1, which plunger, as before stated, is retarded by the dash pot 2. As the plunger rises, the contact arm 4 is brought into engagement with the first active contact and closes a circuit for the motor of the motor generator MG. The motor then be' gins to pick up speed. A short time later, the contact arm 4 comes into engagement with the next. contact and successively with the others until the last contact. is reached, at which time the motor generator is operating at full speed and is straight. across the line. Just before the plunger reaches its highest position. the contact arm 3 passes off the ends of the associated contacts, thereby introducing the resistance 5 into the circuit of the solenoid 6. This resistance is low enough to permit the continued energization of the solenoid 6 and is high enough to prevent the solenoid from heating up.

On the generator side of the motor genera tor, the voltage rises as the machine speeds up, and when it has reached the desired point, which is higher than the voltage of the battery B, a sufiicient amount of current flows through the shunt winding of the marginally adjusted circuit breaker CB to operate the said circuit breaker. \Vhen the contacts of the circuit breaker close, current starts to flow through the battery B in the proper direction to charge it. This current passes through the series field of the generator, which field is wound in opposition to the main or shunt field and comprises a comparatively small number of turns. This iicld is used to keep the output of the generator at a fairly steady point. The generator is so adjusted that the voltage rises considerably higher than normal when the circuit breaker GB is open. This sends a fairly high current through the shunt winding of the circuit breaker and allows the latter to pick up. After the circuit breaker has opera ed. the potential across the terminals of the generator is reduced to practically the potential across the terminals of the battery B. T he shunt winding alone of the circuit breaker is not able to hold the circuit breaker in its operated position at this potential, and the circuit breaker is held in only by the combined energization of the shunt and the series windings.

lVhen the potential across the'busbars rises above a predetermined limit, due to the accumulating charge of the battery B, the

marginally adjusted high voltage relay 46 energizes. Upon energizing, relay 46 closes, at armature 50, a circuit for relay 48 by way of armature 53 and its workingcontact. Relay 48, upon energizing, removes theshunt from around resistance 61 at armature 60 so as to prepare relay-46 -for its next operation; prepares a. locking circuit for itself at armaturc 59; places a shunt around armature 49 and its working contact at armature 58 so as to prevent any possible deenergization of relay 47 at. this time; and at armature 57 closes a circuit for the motor M in series with the left hand field winding thereof as follows: from ground by way of resistance 39, armature 51 and its working contact, working contact of armature 57 and said armature, resting contact of spring 13 and said spring, left hand field winding of the motor M, and the armature of the motor M to battery. The motor M now turns in a direction opposite to that in wiich it turned in the previously assumed example, and consequently rotates the gear wheel 36 in a clockwise direction. The locking lever operates to shift the springs 16 and 17 in the previously described manner just before the tooth on the wheel 35 is in position to engage a notch in the rim of the rack 24. Spring: 17, upon coming into engagement with its associated contact, shorts out the resistance 39 for reasons hereinbefore given. Spring 16,

uponcoming into engagement with its workin" contact, completes a locking circuit for re ay 48 so as. to prevent-the deenergization of the said relay 48 before the desired movement has been completed. The locking lever 30, upon moving a little further, clears the rack as hereinbefore described. A moment later the tooth 40 on the wheel comes into engagement with the notch 41 in the rack 24, which notch; at this time, is in the position occupied by the notch 27 in the drawing. As the tooth is rotated around, the rack-24, together with the wiper :23 and the rack 25, is rotated in a counter clockwise direction until the wiper 23 has moved the distance of two contacts. This cuts in the first counter cell. The tooth 40 leaves notch 41 when the latter is in the position occupied by .the notch 28 in the drawing. A-nioment later, the roller 32- starts to ride up on the wheel 34 and locks-the rack .25 in the usual manner. After the, rack 25 is securely locked and before the locking lever 30 is moved to its fullest extent, the springs 16 and 17 are shifted back- 1o: .normah- .'-Spring 11 cut the-resistance 3& into the circuit of the motor.- .,.M-. asa hereinbeforedescribed. Springdfi, upon -anoying; out; of engagement min r 'upper .contect,--opens-- the locking circuit of relay 48. Assumingthat the cut ting in; oi-{the first counter-cell brings the potential across'the bus-bars down to the desired pgint; relay; 46.-deenergizes,- upon, or :a little: fore, ,the movement of the wiper 23i bein completed; as; before described. Afterr ay 46 has .deenergizedand spring 17 hasshiftedjback to'aiormal,\-it being inmaterialwhich; relay 48 deener- ,gizesand replaces tbeifshfint around. resist- ;ance ,61 at armature 'so'a s'to prepare relay 46 for its next. energiz'atiOm' .As a further =result fithedeenergizationof relay 48, it disconnects the uppercontact' of sprin 16 at armature--59; removes the-:shuntrrom This opens the locking-circuit of relay i.

around, armature 49 audits workingcontact at armature 58;- and;atarmature 57 opens the circuit oLthe motor: M, whereupon the said-motorstop's. f

As.the potential of the battery B riscs higher and higher due to the accumulating charge, the counter cells are cut in one by one n the above described manner. This occurs without producing any other result .until the last counter cell is cut in, at which time the wiper 23 will have been brought into such a position that the end thereof is in engagement with the auxiliary Spring of the spring assembly including the spring 10.

Relay 7, upon deenergizing, opens a. further point in its locking circuit at armature 8, and at armature 9 opens the circuit of the solenoid 6 of the starter S. W'hen this occurs, the plunger 1 immediately drops to its normal position, the dash pot 2 being arranged so as to have practically no rctarding efi'ect on the return of the plunger 1. This, of course, opens the circuit of the motor generator MG. The motor generator now slows down and stops. \Vhen the current flow through the series winding of the circuit breaker Cl Falls to zero, or thercabout, thc armature of the circuit breaker is rc leased owing to the fact that it cannot be maintained energized by the shunt winding alone at the voltage of the battery B. The battery B is now disconnected from the motor generator MG, and the motor. generator MG remains at rest until it is started again when the wiper :23 again reaches the starting position and operates spring 11.

The spring assembl-ics on lheleft and right hand sides of the switching derice SD, comprising springs 32- 15, inclusive. come into use in case the wiper of the switching device is rotated in either direction until it comes into engagement with the last contact. This may occur upon the failure of certainrelays to operate or upon the failure of certain other relays to operate properly, as will be readily understood. Assuming thatthe wiper 23 is rotated in a. clockwise direction until it comes into engagement with the last contact, the end of the said wiper 23 strikes the insulated auxiliary spring associated with the springs 14 and 1 5. lVhen this occurs, spring 14 is moved into engagement with its associated contact and spring 15 is moved out of engagement with its associated contact, therebyclosing a circuit for the alarm buzzer A'at spring 14 and disconnecting the right hand fieldwinding of the motor M at spring :15. The operation of the alarm buzzer A signals an. attendant. who may proceed to'remove the cause. of the trouble. The disconnecting of the .right hand field winding of themotor Vi insures that the said motor Ll does-not drive the wiper- 23 any. further in a clockwise direction. In case wiper-23 is moved into engagement with the-last contact on the left hand side, springs 12 and 13 are operated, whereupon a circuit is closed for the alarm buzzer A as before. 1 ;lso,-the left hand fieldwinding of the motor M is disconnected at spring l3 so as to prevent any further operation of the aripcr 23 in a counter clockwise direction.

It is to be expressly understood that the mechanical embodiment of the improved switching device may assume a great many different shapes and is subject to many modifications and variations, and that the device itself may be put to a great number of widely different uses, such as, for example, varying the number of etl'ectirc turns of a transformer winding by cutting sections in a nd out or cutting resistances in and out for Si.2l|'illlj motors and the like, and for many other 2 us which will readily suggest themselves to those skilled in the art.

It is to. lie-understood also that, while only onewiper or contact arm is shown on the prese'ntEswitchingfl device, as many separate insulated vipersmap-be provided as is found 11eeessa.i in any' situationin which; the switching-device,may be used- 7 It is to be further: understood thatwhile the switching device.isshownhaving a rotary-movement, it:may bea'pplied equallyiwell to a switching l0 de '\-'ice{having ai 1y other-movement, such as, for example, one which slides back and forth over .contactsplaced -.-i n a; straight line. 4 Thevarious features of theinvention, having been described in the foregoing, will now 15 bepointed outflin the .appended claims w m zis .claimedis:

1: irig;;me i1 ber, a 5 motor having f ,a revolving armature neansjjdri ven by; said motor etl'ecfive-only during certain rotations thereof to inZ tnrn. transmit- ;motion. .to; said; .contact carryi g memhe -iin a step lac-step man r, =-;.'mgans stoppings'a'idmotor, and means fo r. preventing; said stopping means from stopping said motor as long ass-aid contact carrying member is being -moved.

:-2.;;Inaswitching device, a contact carrytoingmenibegfi-a motor,-having a revolving 'ai matuie'-.geared-to move said rnember at intervals during, the revolutionof said armature, --an- -.electri c circuit for operating said mQQ a' n impedance 15in: said circuit, and mean sflfor rein'oving,said impedance from said 'cir'c'u'it' each tin e the said member is being-agenda; 'f'. 1

-31 Inaswitching device, a contact carrying membe 1j,T.'-a motor :having a revolving armature which only actuates said contact carrying member during certain revolutions of the armature, a circuit for operating said motor, means for opening said circuit, and means for preventing the last named means from opening said circuit while said contact carrying member is being moved.

4. A voltage regulating system for a storage battery comprising counter cells, a contact arm for cutting said cells in or out of circuit with the battery, a rack and pinion for operating said contact arm, the parts being so proportioned that one cell is cut in or out for each revolution of the pinion, intermediate gearing and a motor of the revolving armature type for driving said pinion, relays sensitive to changes in the bat tery voltage forvstarting said motor running in either direction, and controlling circuits independent of said relays and effective when the motor is started for causingthe motor to run long enough to bring about a complete revolution of said pinion.

, 5. A "oltage regulating and battery charging system comprising counter cells, a switching device for cutting said cells out of circuit with the battery during discharge, a rack and pinion for operating said switch- .l .uI na switchingsdev cq acontact carrying device, reduction gears and a motor;for driving saidpinion,- a relay sensitivej ,to changes in the batteryvoltage for; starting said motor at the proper times, a charging circuit, and means-forautomatically complcting the charging circuit;wlien'thedast counter cell is cutouts, ,1 6. A voltage regulating andbattery'chaigr ing systemcomprising counter cells ,.a switch ing device for cuttingsaid'cells out of circuit with the battery during discharge; a ,rack and} pinion for operatingsaidswitchi glevice reduction gears and amotQIjEfor driving said; pinion, a relay sensitive to changes int-the battery voltage for; startingsaid motor; gal: 39. the p p t m ;a .i ha ngicircui i:me nsi for I, automatically completing the. chargiiig circuit h n: hei onnt eee lis .QQQQHQ; a md y n l t ve;-.-td-,-Qhangsiin th battery voltage, and a ircuit cogtro lled, by, said second. relay from ltimegtmtime gigging; the m f drivi. g-,- $aidJ momma-she! reverse irection;- to switghing-r device to cut, "said counter Hg, in circuit; withthe battery one at agtime g b 7. A voltage regulating endfbaimhl fi gqi g ys mp si gco ntersells, amen-.5 ing device for cutting saidjcell's out 9i circuit; with the battery d ihg:discharge,aai:m9h and p n f ri p'erat ggasaide device, reduction gears and a, imotion for driy ing said pinion, a a, relay se sitivezmnh ngs s 1 in the battery voltage forrst artingsaid motor at the P pe e h r inaa fmn ti means for au omat ellywcomplet ng-at e/ g g iwhe the poimbericel is: cut o a e d relayiisehsitimiteieha gesi in the battery voltage, a. circuit controlled by said second relay from time to time during the charge for driving said motor in the reverse direction to cause said switching device to out said counter cells in circuit with the battery one at a time, and means actuated when the lastcounter cell is connected in circuit for stopping the charge.

8. A voltage regulating system for a storage battery comprising counter cells, a relay sensitive to a drop in the battery voltage, a motor, a circuit for said motor controlled by said relay, a one tooth pinion driven by said motor, a rack operated by said pinion and carrying a contact arm for cutting said counter cells out of circuit with the battery one at a time, a resistance normally included in the motor circuit to limit the speed while said tooth is out of engagement with the rack, and means for automatically shunting said resistance to increase the power While the tooth is in engagement with the rack.

9. In a switching device, a contact carrying member, a toothed rack attached to said member, an electric motor, a pinion geared to the armature of said motor and arranged to engage a tooth of said-rack to advance said member one step for each revolution of said pinion, means for stopping said motor, and means for rendering said stopping means inoperative while said member is being moved.

10. In a switching device, a contact carrying member, a toothed rack attached to said member, an electric motor, a pinion geared to the armature of said rack to advance said member one step for each revolution of said pinion, a circuit for said motor, an impedanee in said circuit, and means for removing said impedance from the circuit only during the interval that said member is being moved. a

11. In a switching device, a contact carryingm'ember, toothed operating and locking racks attached to said member, an electric motor, a pinion geared to the armature of said motor and arranged to engage a tooth of said rack to advance said member one step for each revolution of said pinion, a locking lev'er normally engaging said locking rack, a cam attached to said pinion, against which a projection of said locking lever rests, said cam withdrawing said lever from said lockin'g' rack just before said pinion engages said tooth and returning said lever into engagement with said rack just after said pinion has advanced said member.

l2.- In a switching device, a contact carrying member, toothed operating and locking racks attached to' said member,- an electric motor, a p'ini on geared to the armature of said moto'rand arranged to engage a tooth of said rack to advance said member one" ste for eachrevolution of said pinion, a locking lever normally engaging said locking rack, a

cam attached to said pinion, against which a projection of said locking lever rests, said cam withdrawing said lever from said looking rack just before said pinion engages said tooth and returning said lever into engagement with said rack just after said pinion has advanced said member, means for stopping said motor and springs operated by said lever to disable said stopping means while said lever is withdrawn from said looking rack.

13. In a switching device, a contact carrying member, toothed operating and locking racks attached to said member, an electric motor, a pinion geared to the armature of said motor and arranged to engage a tooth of said rack to advance said member one step for each revolution of said pinion, a locking lever normallyengaging said locking rack, a cam attached to said pinion, against which a projection of said locking lever rests, said cam withdrawing said lever from said looking rack just before said pinion engages said tooth and returning said lever into engagement with said rack just after said pinion has advanced said member, a circuit for said motor, an impedance in said circuit, and springs operated by said lever for removing said impedance from saidcircuit while said lever is withdrawn from said locking rack.

In witness whereof, I hereunto subscribe my name this 25th day ofMay, A. D., 1922.

In witness whereof, I hereunto sub scribe my name this 25th day of May, A. D., 1922 WILLIAM H. PERKINS. 

